Answer:
x (Total number of chocolates) = 27
6 milk chocolates
Step-by-step explanation:
1) [tex]\frac{7}{9} * x = 21[/tex]
2) [tex]\frac{9}{7} *[/tex] [tex]\frac{7}{9} * x = 21[/tex] [tex]* \frac{9}{7}[/tex]
∧ The fraction gets cross-multiplied and gets removed. 21 is then multiplied by 9/7
3) [tex]x = 21 * \frac{9}{7}[/tex]
4) [tex]7 * x =21 *( \frac{9}{7} * \frac{7}{1} )[/tex]
∧ The 9 / 7 gets multiplied by 7 / 1 to become 9. 7 is then multiplied by x
5) [tex]7x = 21 * 9[/tex]
6) Simplify 21 * 9 to 189
7) [tex]7x = 189, becomes, \frac{7x}{7} = \frac{189}{7}[/tex]
8) Simplify to [tex]x = 27[/tex] , where x = total number of chocolates
9) [tex]27 - 21 = 6[/tex] milk chocolates
